Drain-trap.



, G. J. DEHN. DRAIN TRAP.

APPLICATION FILED 1113.17, 1908.

1,046,741. v Patented Dee. 1o, 1912.

gLwSJeS: l 'Y Indezy:

GEORGE J'. DEI-IN, 0F CHICAGO, ILLINOIS.

DRAIN-TRAP.

Specification of Letters Patent.

Patented Dec. 10,1912.

Application led February 17, 1908. Serial No. 416,262.

To all whom t may conce-m.'

Beit known that I, GEORGE J. DEHN, a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Drain- Traps, of which the following is a full, clear, and exact description.

The invention relates to trap-pipes or drains which are usually arranged in or beneath the floor of a building for the drainage of water from the floor.

' The invention designs to provide an improved trap-drain which may be readily installed or set into desired position and which embodies improved means for preventing back-flow of the water through the drain or trap.

The invention further designs to provide an improved combined trap and drain which is simple in construction.

The invention consists in the several novel features hereinafter set forth and more particularly defined by claim at the conclusion hereof.

In the drawings: Figure l is a vertical section of a trap and drain-pipe embodying the invention. Fig. 2 is a horizontal section on line 2-2 of Fig. l, the receivingbasin being shown in position assumed before it has been given a slight turn to lock it to the trap-pipe. Fig. 3 is a perspective of the seat for the back-water valve. Fig. l is a perspective of the upper end of the trappipe; and Fig. 5 is a perspective of the valve-cage or guide.

A drain-pipe A is formed with the usual trap-bend a disposed below the lowest portion of the outlet portion a of said pipe, to form a water-seal for preventing objectionable gases from the sewer or discharge to which the pipe is connected, from escaping through the inlet-terminal of the trap-pipe. The outlet-terminal a of the trap-pipe is provided with a flange a2 whereby it may be secured to a section of pipe leading to the sewer or discharge. The inlet-terminal a3 of the trap-pipe extends vertically and has removably secured to its upper end by screws b5, a ring B usually made of brass, the lower flange Z9 of which is flared to form a valve-seat for a back-water valve C. Said valve is guided to and from its seat by bars g of a cage Gr and the inlet-pipe-terminal as is enlarged to receive the valve-cage. Said valve is usually a hollow ball formed of suitable material to render it buoyant so it will float and rise in the cage G, when there is back-pressure in the trap-pipe from the sewer, the water in the trap causing the float-valve C to rise in the inlet-terminal a3 of the trap-pipe and engage valve-seat Z) and thus prevent back-iow of water from the discharge or through the trap-pipe. Thus, it will be seen, that the invention provides a simple and eiicient trap-pipe having therein a back-water valve which prevents back-flow of water.

The cage G comprises a ring g at its upper end which is adapted to interlock with lugs b2 on the valve-ring B. Said ring g is provided with notches g2 which permit it to be slipped over lugs b2 into position adjacent the top of the valve-ring and then turned to cause the ring g and the cage to be interlocked with the valve-ring. This connection provides a simple one between the valve-cage and valve-seat. The lower portion of the bars g of the cage serve as stops for limiting the downward movement of the valve so that it will not be displaced by the water rushing downwardly through the inlet-terminal of the trap-pipe.

A flange a5 is integrally formed on the outer side of inlet-terminal a3 of the trappipe to form a seat for the base e of a drainreceiver E. This receiver extends outwardly and upwardly from its base to form a receiving-basin and is provided with a rim c2 having an annular recess or shoulder e3 for a perforated cover D. This cover is removable to provide access to the trap and basin.

A quickly attachable connection between the trap-pipe and the receiver, whereby the basin will be properly secured so that a water-tight joint between the base of the basin and the pipe-flange a5 will be formed, is provided. This connection comprises a series of vertical ribs or lugs a6 integrally formed on the outer side of the trap-pipe and a corresponding series of notches c5 in the base-flange of the receiver. The lower ends of said lugs are disposed so the inner edge of said base will pass between said lugs and the pipe-flange a5 and adjacent each of the notches c5 is formed a wedge-surface 06 adapted to be driven between the lower ends of said lugs, to jam the base-flange of the receiver against the pipe-fiange at and form a water-tight connection between said parts. Furthermore, the receiver-basin, will, by

means of this connection, be held so it will be tightly held in connected relation` to the trap-pipe. Usually a coating of suitable material, such as white lead, is placed on the top of the flange or bottom of the receiver to make the connection water-tight. To attach the receiver to the drain-pipe, it is only necessary to slip the receiver over the upper end of the trap-pipe with the ribs as in notches c5 of the receiver. lVhen the basin rests on the pipe-flange a slight turn of the basin will cause the wedge-surfaces c to pass beneath said ribs and lock the trappipe and the receiver together.

The inlet-terminal a3 of the trap-pipe eX- tends above the base of the receiver and resultantly an annular chamber or trap c7 is formed to collect dirt and such other solid matter-as may pass through the strainer and prevent the dirt from passing into the trappipe. The perforations in the strainer-top are disposed above the chamber c7 todirect the solid matter into said chamber. The body of water remaining in chamber c7 tends to lower the temperature in the receiver and prevents undue evaporation of they water in the trap-pipe;

The invention provides an improved trappipe having therein a back-water valve.A Furthermore, the invention provides an improved construction of trap-pipe and receiver therefor which can be made at a low oost andV quickly and conveniently installed.

Having thus described the invention, what I claim as new andvdesire to secure by Letters Patent, is:

l.. The combination of a drain-pipe having an upwardly extending inlet-terminal, a back-water valve in said pipe, a ring removably secured tosaid pipe and provided with a seat for the valve, a cage for guiding the valve to and from the seat, a ring secured to and forming the upper end of the cage and removable therewith, and means for detachably securing said rings together to permit the cage ring to be disconnected from the seat-ring.

2. The combination of a drain-pipe having an upwardly extending inlet-terminal, a back-water valve in said pipe, a ring removably secured to said pipe and provided with a seat for the valve, a cage for guiding the valve to and from the seat, a ring secured to and forming the upper end of the cage and removable therewith, and interlocking lugs on said rings for detachably securing them together to permit the cage ring to be disconnected from the seat-ring.

GEORGE J. DEHN. Witnesses: Y

FRED GERLAGH, LEONE S. RUSSELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

